Injector Circuit High - Cylinder 12
The P0297 code means the vehicle's onboard diagnostic system has detected: Injector Circuit High - Cylinder 12. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $800 (parts and labor)
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Common Symptoms
- Check Engine Light on
- No fuel to cylinder 12
- V12 misfire
- Reduced power output
Probable Causes (Ranked by Likelihood)
- Open circuit in cylinder 12 wiring Very High
- Failed injector (open coil) High
- Disconnected connector Moderate
- PCM driver open Low
Step-by-Step Diagnostic Procedure
-
Measure injector resistance.
-
Check connector.
-
Test wiring continuity.
-
Replace injector if needed.
Frequently Asked Questions
Is P0297 the last injector circuit code?
Yes, P0297 is for cylinder 12, which is the maximum number of cylinders covered by standard OBD-II injector codes.
Can the PCM for a V12 be tested separately?
Yes, you can backprobe the PCM injector driver pins to verify output signals independently of the injector and wiring.
Are V12 engine repairs always expensive?
Generally yes, due to parts cost, labor time, and the specialized knowledge required for luxury and exotic engines.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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